Permanent way for tramways in asphalt paving and the like.



H. SCHMIDT. PERMANENT WAY FOR TRAMWAYS IN ASPHALT PAVING AND THE LIKEl APPLICATION FILED MAILS. 1914.

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"trineo scHMinr, orciaaiioasrnnrind en GERMANY-it EERMA'ENT varia'E Fon 'TRAMWAYSIN AsrHAL'rrAvING AND LIKL To all whom it may concern 1 Be it lmown thatIfHUeo SCHMIDT, asubject ,of theEmperor of Germany, residing at Bismarckstrasse 1 Y 66,- f Charlottenburg, near Berlin, Germany, have inventedfcertain new yand useful Improvements, in yPermanent Ways `for` 'Iyiainways injAsphaltPaving and the like `and Ido herebydeclare thefollowing tof be a fulhgclear, ,and exact description of the invention, suchkk as will 'enablegothers f, skilled in y,theart towhich it appertains to f 1 5k problem inthe y,construction of the per? make anduse,thesame,refe1ence being had tto the accompanying drawings, y,and 'tol letters or iiguresof- ,reference marked thereon, which form a parteithisspeciiication. Y

marient for ltramlays 'o which. has hith- Yerto not been solved, was to lay thetramway 3railsin suchla manner in asphaltpaving,

that 4the asphalti would not be as quicklyvas hitherto destroyed alongside of the rails.

In the mostly `employed rigidsystems ofthey permanentrway ithasbeen attempted to sejcure such4 durability of the payement -by `employingheavy rails with as Lgreat a bending strength as possible, and, by connecting thesey rails inA as rigid armanneras possible y"with thegconcrete beddingby means of reinforced concrete pla-tes, anchoring boltslan'd the like.,y e

n Thelearly and destruction `of thel pavement alongside of'therails-j is a yresult [of fthe fact that the ,vibrations and blows,

which thewhe'els of thecars produce in the ,direction of their` travel on the y rigidly laid rails i wilhon; the one hand, slacken the ycohesion between'the ,asphalt and the Asidesof the, rail, and, `on the otherhand, resultin excessivefstrainson the surfaceof the, rails,

which lead `to corrugations yQor waves, yand eventually ,destroy the concrete beddingfunder themails, which cannotforever kwith- ``,stand these attacks. As soon as there is the leastqslackbetween railr asphalt, the

aterentering', into fthey crevices will'very quickly complete the destruction. u', In recent kyears it has been tried tofavoi'd .the disadvantages caused bythe rigidity of t the tracksby elastically supporting the rail `on Wooden sleepers, whichcwere embedded in l the OUDQMOPJWH efoconfete @ftheroadspecificationofftetfelfs raamt;

o road c pavement.

, c n RMANnTASSIGNQRTo resaltar rflsro L E ns'rrsonnn s'rRAssENBAHN-QBERBAU'G; ,M ,r BIH., oEBERLIN-WILMEBSDORF,

y y krait-entedAngie,i915, J1 Appiicaupnniediviafch6,1914. se1-ia11\fo.s22,e91.

vantageswinherent" in,` the elastic bedding,

railunder the load rolling overy it would yfar more t quickly result in a loosening ofv` the rail fromthe asphaltand concrete adhering to it, yandin a destruction of theflatter., This method thus proved va :failure as regards `the object of improvingthe. durability of the t TheV problem of `utilizing the yadvantageo j anelasticsupporting' of the rail in favor ofthe latter andthezrolling y stockavithout lany injuriouseifects on( the t `pavement oftheroad Ican be consideredas fr .solved lonly, if itis rendered Ipossible `to keep the r hard` shocks away from those parts fof the structure of the permanent way, to which the `asphalt v paving and the concrete are ,varieties of the iinvention which ,are `eX- .plained inthe following specification.y

rejoined. This object is obtained bythe pres- The permanent way, constructedaccord# ingl to the present, novel ymethod is :shown yin .cross section in Fig., l. v, Itme'ets the requirementsinthefollowing manner. yIt is comv posedfof essentially two parts, the rail ai and the rail'boX al, separatingthersaidrail'a from, the fasp'hfalt band the concretefoundation Contrary together known arrange-` ments, rail and.l rail boxare,however,not

parts. j

rigidly connectedy directly to eaclnothe'rfby means of metallic `parts. `Theessential feature of thepresent invention ,consists in that ,the rail isfon all sides completely insulated `from the railf boxj by elastic `intermediate .y `InF-ings.,y several;L lconstructional forms of the 'invention are exemplified, 't by fwhichitherail is elastical'lyvinsulated from In 4the constructional 4j'form; shown in i thezrail ris' separated below, fromf` the' rail box tby means of an elastic layer,fawooden sleep`erfe`, andat the `two sides' by intervenjing spaces, which are lled'with an. elastic medium(impregnated soft `rwoody, rubber "f said boX isjfilled with an kelastic medium,

the said railheld toitsbed by elastic clampy ing means.

2. PermanentWay' `or tramways' in asphalt paving and the like, in Which the rail -is elastically bedded rin a rail boX, and they space between the rail and the Walls of the made of r-ran elastic materialv yby suitable means.

Permanent Way for tramvvays in asphalt paving andthe like, in which therail is elastically bedded in a railk box, and the space between the rail'andthe Walls of the y vsaid box is filled With an elastic medium,

the said'raili held to its bed by elastic iron clamps.

Permanent way for tramways' in 1as-` phalt paving and the like, in which' the'rail iselasticallybedded- 'in' a rail box, fand the space betwe'enthe rail and thefWalls ofthe said box' is filled with an elastic medium, j the said rail held toits bed byelastic means,

@epics of this patent may be obtainedifor extended 'bases' ina manner the "said-rail box having on `its voutsides`v flanges engaging in the body ofthe roadbed beneath the road covering and anchored to `l y said roadbedj Y i n 5. Permanent Way for tramways iny as-v phalt pavingand the like, kinvvhich the `rail is elastically bedded in a rail boX, and the said box' is "filled with an elastic medium,

ythe said rail held to its bed by elastic means, the*y said rail box having on its .outsides a flanges engaging the body ofthe roadb'edi beneath the road covering and anchored to said roadbed, thesaid rail boxes jointed to eachother by aid of said-flanges and the bending stresses. n M

In testimony that I claim the foregoing space betweenthe rail' and the Walls of the rk as myinvention, Ihave signed my namein presence of .tWo subscribing Witnesses. .y e ,y y vHUGO SCHMIDT.` y

Witnesses:

HENRY HASPER, WOLDEMAR HAUPT.,1 v

` 'n Washington, D. C. y

ve cents each, by addressing'the Commissioner of Patents,

40,] proof against y. 

